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Low-Wind-Speed Galloping Wind Energy Harvester Based on a W-Shaped Bluff Body

Author

Listed:
  • Jianfeng Zheng

    (School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China
    Jiangsu Province Engineering Research Center of High-Level Energy and Power Equipment, Changzhou University, Changzhou 213164, China)

  • Zichang Li

    (School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China)

  • Han Zhang

    (Key Laboratory of Noise and Vibration, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)

Abstract

Galloping-based piezoelectric energy harvesting systems are being used to supply renewable electricity for low-power wireless sensor network nodes. In this paper, a W-shaped bluff body is proposed as the core component of a piezoelectric wind energy harvester. Experiments and simulations have shown that the W-shaped bluff body can improve harvesting efficiency at low wind speeds. For the W-shaped structure, the finite element simulation results indicate that the structure can help improve the aerodynamic performance to obtain high aerodynamic force. The experimental results demonstrate that compared with the traditional bluff bodies, the piezoelectric wind energy harvester with the W-shaped bluff body (WEHW) can generate higher output voltages and has a lower cut-in speed. When the length L is 30 mm and the rear groove angle β is 30°, the W-shaped structure can induce the best harvesting performance. When an external load resistance of 820 KΩ is connected and the wind speed is 5 m/s, the WEHW generates an average output power of 0.28 mW.

Suggested Citation

  • Jianfeng Zheng & Zichang Li & Han Zhang, 2024. "Low-Wind-Speed Galloping Wind Energy Harvester Based on a W-Shaped Bluff Body," Energies, MDPI, vol. 17(4), pages 1-20, February.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:4:p:958-:d:1341273
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    References listed on IDEAS

    as
    1. Wang, Hao & Jasim, Abbas & Chen, Xiaodan, 2018. "Energy harvesting technologies in roadway and bridge for different applications – A comprehensive review," Applied Energy, Elsevier, vol. 212(C), pages 1083-1094.
    2. Zhao, Liya & Yang, Yaowen, 2018. "An impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting," Applied Energy, Elsevier, vol. 212(C), pages 233-243.
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